Low energy bulbs are damn all use in certain areas - i.e. downstairs loo. Gets a few minutes' use per day (unless I've been on the curry!) has to work immediately when switched on (again, sometimes the requirement is more immediate than others!).
Low energy bulbs don't like being cycled on and off, take ages to reach maximum output and the energy consumption of a rarely-used light is irrelevant compared to other items in the house.
If they wanted to make a difference why didn't they ban tumble driers instead?
I haven't even mentioned that the light is of a much poorer quality than that from an incandescent bulb, that they are hazardous to dispose of (as opposed to a bit of glass and a bit of metal) and the interference that low energy bulbs cause to me as a radio amateur.

Still, this is what happens when politicians take over control from people who actually know their subject. They learnt all they know from reading the packet of a low energy bulb!
Kevin